import { defineStore } from "pinia"
import { ref, computed } from 'vue'
import { useUserStore } from "./userStore"
import { insertCartAPI, findNewCartListAPI, delCartAPI } from "@/apis/cart"

export const useCartStore = defineStore('cart', () => {
  const userStore = useUserStore()
  const isLogin = computed(() => userStore.userInfo.token)
  const cartList = ref([])
  const updateNewList = async () => {
    const res = await findNewCartListAPI()
      cartList.value = res.result
  }

  const addCart = async (goods) => {
    const { skuId, count } = goods
    if (isLogin.value) {
      // 登录之后的加入购物车逻辑
      await insertCartAPI({skuId, count})
      updateNewList()
    } else {
      const item = cartList.value.find((item) => goods.skuId === item.skuId)
      if (item) {
        item.count++
      } else {
        cartList.value.push(goods)
      }
    }
  }

  const delCart = async (skuId) => {
    if (isLogin.value) {
      await delCartAPI([skuId])
      updateNewList()
    } else {
      const idx = cartList.value.findIndex((item) => skuId === item.skuId)
      cartList.value.splice(idx, 1)
    }
  }
  
  const singleCheck = (skuId, selected) => {
    const item = cartList.value.find((item) => item.skuId === skuId)
    item.selected = selected
  }

  const allCheck = (selected) => {
    cartList.value.forEach(item => item.selected = selected)
  }

  const clearCart = () => {
    cartList.value = []
  }

  const allCount = computed(() => cartList.value.reduce((a, c) => a + c.count, 0))
  const allPrice = computed(() => cartList.value.reduce((a, c) => a + c.count * c.price, 0))
  const isAll = computed(() => cartList.value.every((item) => item.selected))
  const selectedCount = computed(() => cartList.value.filter((item) => item.selected).reduce((a, c) => a + c.count, 0))
  const selectedPrice = computed(() => cartList.value.filter((item) => item.selected).reduce((a, c) => a + c.count*c.price, 0))

  return {
    cartList,
    addCart,
    delCart,
    allCount,
    allPrice,
    singleCheck,
    isAll,
    allCheck,
    selectedCount,
    selectedPrice,
    clearCart,
    updateNewList
  }
}, {
  persist: true
})
